How many different sites of West Lake we are going to use as sample areas. These sites must have varying current, depth of water, substrates. But remember that sample areas must be chosen at random ("random sampling"), but try to have variety of sample areas with variations of these three factors. We can have map of West Lake and think about sample areas we are going to collect samples from.
Modified:
We could only use Simpson's Diversity Index becuase EPT Richness and PTI Index works only for running water like river.
We cannot catch fish for doing SDI becuase we need to use capture, mark & recapture but it is not realistic. So catch only macro-invertebrates.
Theme of conservation:
Using the Simpson's diversity index to distinguish the general "health" of West Lake, Hanoi.
EPT richness calculation can also be used to distinguish the health of this body of water.
PTI: another measure in which we can find a general estimation to the health of the lake.
Together with these mediums of diversity measurements, we can get a clearer look at the state of west lake, and what role conservation should play in restoring/improving its health.
Topics/unit that relate: Topic 5 Ecology & evolution + OptG Ecology & conservation Ecosystem of the West Lake (West Lake Ecosystem) (ecosystem = a community and its abiotic environment) Conservation of diversity of the West Lake community (like Simpson's Diversity Index) Sample a population in the West Lake using different sampling methods Fishery (fishing) in West Lake, fish Distribution of different species in the West Lake e.g. xxx are mostly found in deep water while xxx are mostly found in shallow area of the West Lake Human impacts on the West Lake Ecosystem (are there any evidence
Assess the level of pollution/health state of West Lake (refer to the "Comparing Two Rivers Lab") In "comparing two rivers" lab, we only considered macro-invertebrates in the river, but we should somehow consider about fish as well in this case for West Lake. Make qualitative observations first like clarity of water, if rubbish are thrown inside Use biotic indicators that gives indication for the quality of water - 1 Simpson's Diversity Index 2 EPT Richness 3 PTI (Pollution Tolerance Index)
What we will do at West Lake: We will assess the extent of the health of this body of water by using the simpsons diversity index. We will sample the living organisms using this index to determine if the lake is healthy or not. We will also use a pH probe to test any relation between the pH and the levels of living organisms present in the lake. By sampling multiple areas, we could possibly identify a link between these two tests.
Results:
Species
Number of individuals (n)
n-1
n(n-1)
Gilled Snail (black-greenish)
10
9
90
Gilled Snail (dark brown)
8
7
56
Pouch Snail
34
33
1122
Dragonfly Larva
62
61
3782
Water Snipe Fly Larva
12
11
132
Caddisfly Larva
2
1
2
Riffle Beetle
6
5
30
Pradaceous Diving Beetle
2
1
2
Water Mite
4
3
12
Maroon coloured beetle (unidentified species)
28
27
756
Beetle with black and yellow stripes on its back (unidentified species)
2
1
2
total
170
5986
N = Total Number of organisms
n = Number of individuals of each species
D= 170(170-1)/( 5986) =4.7995
This indicates high levels of pollution and low diversity.
Plan:
How many different sites of West Lake we are going to use as sample areas. These sites must have varying current, depth of water, substrates.But remember that sample areas must be chosen at random ("random sampling"), but try to have variety of sample areas with variations of these three factors.
We can have map of West Lake and think about sample areas we are going to collect samples from.
Modified:
We could only use Simpson's Diversity Index becuase EPT Richness and PTI Index works only for running water like river.
We cannot catch fish for doing SDI becuase we need to use capture, mark & recapture but it is not realistic. So catch only macro-invertebrates.
Theme of conservation:
Using the Simpson's diversity index to distinguish the general "health" of West Lake, Hanoi.
EPT richness calculation can also be used to distinguish the health of this body of water.
PTI: another measure in which we can find a general estimation to the health of the lake.
Together with these mediums of diversity measurements, we can get a clearer look at the state of west lake, and what role conservation should play in restoring/improving its health.
Topics/unit that relate: Topic 5 Ecology & evolution + OptG Ecology & conservation
Ecosystem of the West Lake (West Lake Ecosystem) (ecosystem = a community and its abiotic environment)
Conservation of diversity of the West Lake community (like Simpson's Diversity Index)
Sample a population in the West Lake using different sampling methods
Fishery (fishing) in West Lake, fish
Distribution of different species in the West Lake e.g. xxx are mostly found in deep water while xxx are mostly found in shallow area of the West Lake
Human impacts on the West Lake Ecosystem (are there any evidence
Assess the level of pollution/health state of West Lake (refer to the "Comparing Two Rivers Lab") In "comparing two rivers" lab, we only considered macro-invertebrates in the river, but we should somehow consider about fish as well in this case for West Lake.
Make qualitative observations first like clarity of water, if rubbish are thrown inside
Use biotic indicators that gives indication for the quality of water -
1 Simpson's Diversity Index
2 EPT Richness
3 PTI (Pollution Tolerance Index)
What we will do at West Lake:
We will assess the extent of the health of this body of water by using the simpsons diversity index. We will sample the living organisms using this index to determine if the lake is healthy or not. We will also use a pH probe to test any relation between the pH and the levels of living organisms present in the lake. By sampling multiple areas, we could possibly identify a link between these two tests.
Results:
D= 170(170-1)/( 5986) =4.7995
This indicates high levels of pollution and low diversity.